people in the area had seen well-preserved floor, good artifacts on the inside, thatched roof collapsed down onto the floor but perfectly preserved. they all thought it's a recent house under a recent volcanic eruption. when i came here, i thought exactly the same thing. but being curious about things, i decided i'd like to know what it dated to. so pulling out my trusty trowel and scraping along the floor, right along here, i found some pieces of pottery. but the pieces of pottery were all prehistoric, classic period pottery. i was looking for a coke bottle, a piece of plastic, some tin foil, something to give me an idea of what the date of the structure was -- only prehistoric pottery. so immediately i perceived a powerful opportunity to really embarrass myself professionally by saying, "whoa ! it's prehistoric ! "it's fantastic ! total preservation !" decided, eh, little bit of caution here before doing that, and submitted a series of thatch samples for radiocarbon dating.